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/* outbyte.S -- Write one byte for OpenRISC 1000.
*
* Copyright (c) 2014 Authors
*
* Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de>
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*/
#include "include/or1k-asm.h"
.global _or1k_outbyte
.text
_or1k_outbyte:
LOAD_SYMBOL_2_GPR(r4,_or1k_board_uart_base)
l.lwz r4, 0(r4)
l.sfeq r4, r0
OR1K_DELAYED_NOP(l.bf .Lnouart)
.Luart:
OR1K_DELAYED_NOP(l.j _or1k_uart_write)
.Lnouart:
OR1K_DELAYED(
OR1K_INST(l.nop 0x4),
OR1K_INST(l.jr r9)
)
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